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acevedo, rafael a.
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aljuaied, ali m.
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alzaghal, mohamad h.
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beery, paul t.
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Continuous waveform (CW) polyphase sequences for radar have a much lower power spectral density (PSD) than pulsed signals but can retain the same target detection capability. The use of different phase values or subcodes to modulate the carrier provides a low probability of intercept (LPI) radar waveform which cannot be seen by a non-cooperative intercept receiver (NCIR). Also, it is a low probability of detection (LPD) waveform due to the low PSD. Frequency shift keying (FSK) radar has a...
Topics: Continuous waveform (CW), power spectral density (PSD), non-cooperative intercept receiver (NCIR),...
Naval Postgraduate School
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Femtocells are low power base stations that communicate through a licensed spectrum with the intent to improve coverage and performance of voice and broadband services. The Femtocell works through a cellular network provider to enhance cellular portable/mobile devices especially in locations where coverage by cellular systems using large cells is weak and intermittent. The use of smartphones, tablets, and other wireless devices is becoming increasingly prevalent and is driving the need for...
Topics: Femtocell, Wi-Fi, HTTP, VoIP, RTP, Femtocell Base Station, Femtocell Access Point, UMTS, WLAN,...
This thesis examines the development of the measures for evaluating new tactical command and control (C2) systems such as the Combat Vehicle Command and Control System (CVC2). Using those measures it discusses the various techniques available to evaluate CVC2 and recommends the selection of one technique. In order to establish a strong foundation for understanding the needs of a battalion task force C2 system, the systems, processes, procedures, and standards available to the commander are...
Topics: C2, Command and control, CVC2, Evaluation technique
Naval Postgraduate School
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This research analyzes the enrollment growth of the Tuition Assistance (TA) program and the continued decline in enrollment within the Navy College Program for Afloat College Education (NCPACE). NCPACE has provided higher education with alternatives to traditional methods of instruction for Sailors and Marines for over four decades. TA and NCPACE utilize two primary methods of instruction: distance learning (DL) and traditional instructor-led (IL) for their college educations. The research...
Topics: Navy, tuition assistance, TA, Navy College for Afloat College Education, NCPACE, voluntary...
This thesis presents a comparison and analysis of two Department of Defense (DoD) acquisition methods: the formal acquisition process and the Advanced Concept Technology Demonstration (ACTD). Both processes can be and are used by DoD to acquire information technology (IT), but while DoD has utilized the formal acquisition process for 30 years, the ACTD process is only 6 years old, and was specifically designed to improve upon the standard acquisition process (when applied to IT). By describing...
Naval Postgraduate School
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This thesis compares the detection performance of the 1-1/2 D instantaneous power spectrum (1-1/2 D sub ips), the bispectrum, the instantaneous higher-order moment slice (IHOMS) method, and the spectrogram for multi-component stationary signals, harmonically related stationary signals, and multi-component linear FM signals corrupted by additive white Gaussian noise. In addition, a determination of the relative processing gain between the 1-1/2 D sub ips method and the spectrogram is made for...
Topics: Bispectrum, 1-1/2 D, Higher-order moments, Cumulants
Naval Postgraduate School
by Dunscomb, Kenneth D.
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In the Bottom-Up Review conducted in the aftermath of the collapse of the Soviet Union, DOD identified the proliferation of nuclear weapons as the new primary threat to the national security of the U.S. In response to this new threat, the Clinton Administration signaled a shift in emphasis in proliferation policy to include counterproliferation as a major policy goal. This thesis examines proliferation policy from a resource perspective. After a brief history of past U.S. proliferation policy...
Topic: NA
Naval Postgraduate School
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This thesis deals with a simulation of a missile versus target engagement scenario. After driving simplified transfer functions for the missile seeker head, missile autopilot, missile dynamics, and target dynamics, a three dimensional simulation is developed using classical proportional navigation. The scenario is simulated using state variable design. A forward time solution of the two dimensional problem is developed which is converted to an adjoint model. The adjoint model is used to...
Topics: Guided missiles, Transfer functions, Dynamics, Time, Proportional navigation, Antiaircraft...
State governments have been recognized as the fusion point for a significant portion of policy, operational, and implementation activities for homeland security. Additionally, the most critical decisions for allocating resources and prioritizing efforts have been delegated to states. The federal government has required this role of states and has asked them to organize task forces to deal with these challenges but has provided little guidance about how states might establish, administer, and...
Topics: Terrorism, Prevention, State governments, United States
Naval Postgraduate School
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The Secretary of the Navy has ordered the U.S. Navy and Marine Corps to reduce energy usage. This study explores how to optimize placement and size of a non-intrusive waste heat recovery device for energy recovery in exhaust ducts. Additionally, it explores the effect that a device has on the exhaust infrared signature by analyzing the change in the bulk temperature at the exhaust outlet. Optimal device placement and size is dependent on duct geometry, external heat transfer coefficient, and...
Topics: Waste heat recovery, thermoelectric generator, optimization, IR signature, heat transfer, thermal...
Naval Postgraduate School
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U.S. Navy forces are becoming increasingly dependent upon the Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance (C4ISR) networks that support them. This network is critical to the task of quickly putting effective weapons on important targets. Today, the delivery of weapons by U.S. Navy air and surface forces is increasingly dependent upon critical targeting information that is often provided by a network of third-party sensor and communication systems....
Naval Postgraduate School
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Identifying communities in a dark network is a potentially difficult task. The nature of dark networks, and their characteristic of con-cealing connections within the network, makes community detection an enterprise based on operations and decisions with only partial information. We take this concept of operation with only partial information, and extend it to our work by identifying communities within a dark network using only a single layer from the full multilayer network. Additionally, the...
Topics: multilayer networks, partial information, network discovery, synthetic network construction,...
Naval Postgraduate School
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Law enforcement, military personnel, and forensic analysts are increasingly reliant on imaging ystems to perform in a hostile environment and require a robust method to efficiently locate bjects of interest in videos and still images. Current approaches require a full-time operator to monitor a surveillance video or to sift a hard drive for suspicious content. In this thesis, we demonstrate the effectiveness of automated analysis tools to detect AK-47s in images. By training on a large corpus...
Topics: Computer science, Computer crimes, Investigation, Law enforcement, Firearms
Naval Postgraduate School
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The application of Radio Frequency Identification (RFID) technology in hospitals is modest primarily due to cost and policy issues. Similar to the evolution of other electronic technologies, unit costs for components have been dramatically reduced in the past few years. Despite the reduction in costs, RFID technology has not yet achieved the tipping point of economic rationality for adoption at most healthcare organizations. Although the technology has been primarily applied to asset management...
Topics: Electronics, Radio frequency, Sea control, Architecture, Hospitals, Medicine, Information...
Naval Postgraduate School
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The author presents a detailed description of the components, architecture, links, and operations of the ORB COMM global messaging and position determination system. ORB COMM is the first commercial venture to offer worldwide personal communications service (PCS) using non-voice-non-geostationary (NVNG) low earth orbit (LEO) satellite technology. Link budget analyses of the system's satellite up and down links are presented. The author analyzes ORB COMM's proprietary multiple access scheme for...
Naval Postgraduate School
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A parametric study of a body of revolution is conducted utilizing existing semi-empirical methods for the calculation of hydrodynamic coefficients. The geometry of the body is analyzed in non-dimensional length and volume parameters. The effects of varying the nose, mid-body, and base fractions of the body on the hydrodynamic coefficients are generated and illustrated graphically. Equations for the hydrodynamic coefficients are then determined from the non-dimensional parameters. The results...
Naval Postgraduate School
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Two disadvantages of using Silicon Graphics, Inc. (SGI) computers and SGI's IRIS Performer application programming interface (API) in NPSNET are the current inability to run the graphic simulations on more popular environments, such as personal computer (PC) operating systems, and the increased expense associated with the alternative of choosing graphics specific hardware over lower cost PCs. Work detailed in this thesis addresses these problems by porting the graphics code from NPSNET to...
Naval Postgraduate School
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Over the last decade, the Marine Corps has capitalized on the advantages of the Internet by increasingly using the NIPRNET for electronic operations and communications. The Marine Corps wants to further leverage the capabilities of the Internet by moving more applications to the NIPRNET, however, security threats have restricted the type of information that can be exchanged across public networks. The Internet's open design enables message interception, monitoring and forgery; therefore, the...
Naval Postgraduate School
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With the passage of Executive Orders 12902 and 13123, the U.S. Navy has been forced to develop water conservation programs and evaluate how water is used at each of its installations. The central goal of these orders is to reduce potable water consumption at federal facilities. Water reuse and recycling has been listed as a best management practice for achieving this goal. However, only a handful of Navy facilities have implemented water reuse projects to date. One of the reasons for this...
Topic: Water conservation|xLaw and legislation|zUnited States.
Investigation of steady and unsteady flowfields over airfoils is an active area of current computational and experimental research. In this study, the compressible, viscous, flow over a single and multi-element airfoil is numerically simulated by solving the Navier Stokes equations. The motivation for this work includes interest in studying the effects of a stationary/flapping airfoil combination in tandem configuration. A single-block Navier-Stokes (NS) solver is employed to compute unsteady...
Naval Postgraduate School
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This thesis focuses on a theory of leading and the activities and processes used to move a bureaucratic, public agency to a higher level of fitness in the contexts of dynamic equilibrium and the edge of chaos. The main claim is that leading and all of its components thinking and sense making, storytelling and demonstrating the right ideas, and organizing action and shaping collective movement are required for an organization to address the complex, coordinating problems of homeland security....
Topics: Associations, institutions, etc, Grounded theory, Chaotic behavior in systems, Leadership, Civil...
Naval Postgraduate School
by Rigoni, Michael P.; Correia de Souza, Wagner
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In 2013, the Department of Defense (DOD) implemented an accuracy metric to monitor how well the services and Defense Logistics Agency were forecasting demand for inventory items. After three years, results were still poor. DOD uses a metric derived from the Mean of Absolute Percentage Error, yet it differs in significant ways, such as including unit cost to enable the aggregation of data pertaining to all items. In this study, we analyze how unit cost and other parameters affect the validity of...
Topics: comprehensive inventory management improvement plan, mean of absolute scaled error, lead time...
This thesis presents and analyses the results of a survey designed to determine how Department of Defense financial management education and training programs assess the quality of their programs. Quality in the context of this thesis means providing accurate, valid, comprehensive and up-to-date information to meet the needs of clients and customers. The thesis explains the need within the Department of Defense for financial management education. It documents the methodology employed in...
Topics: Finance, Management, Financial management, education and training, survey methodology, survey...
Naval Postgraduate School
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This thesis was a continuance study on the feasibility of implementing a code division multiple access scheme which utilizes optical fiber delay lines. This report explores pseudo-orthogonal address codes with a periodic correlation properties for on-off signaling. The optical functions such as code sequence generation and correlation are performed by parallel optic delay lines acting as encoders and decoders. This experiment shows the desired auto-correlation and cross-correlation properties...
As the Army continues to face force and budget reductions while maintaining a high state of readiness, reliance on advanced technology systems is becoming more essential. The Army's leadership has recognized this challenge and is seeking ways to ensure readiness. This thesis explores the application of the built in test (BIT) maintenance concept in supporting readiness in the Fire Control System (FCS) of the Multiple Launch Rocket System (MLRS). It provides background on the current Fire...
Naval Postgraduate School
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MarineNet offers distance learning (DL) training and education (T&E) opportunities to all Marines. For active duty Marines, government-provided desktops and laptops (GPDLs) typically support DL T&E or learning resource centers (LRCs) located inside many military installations. In contrast, Marine Forces Reserve (MFR) personnel have a unique challenge: most MFR units are located in home training centers (HTCs) away from military installations. Consequently, reserve Marines do not have...
Topics: distance learning, virtual machine, Marine Forces Reserve, learning resource centers
As the all-hazards approach takes hold in our national Emergency Management and Homeland Security efforts and continues to seek greater collaboration between these two fields, an area that has yet to be explored to its fullest extent is the utilization of an intelligence process to enhance EM operations. Despite the existence of multiple Federal-level policies that outline the importance of intelligence and information sharing across the all-hazards community, EM is still by-and-large an...
Topics: Emergency Management, Intelligence, Intelligence Cycle, All-hazards, Intelligence Preparation of...
: The purpose of this thesis is to investigate the effects of sensing capability on ground platform survivability during ground force maneuver operations. Sensor classification probability of ground platforms and speed of unmanned aerial vehicles (UAV) are the factors being studied, and the Map Aware Non-Uniform Automata (MANA) agent-based simulation software was used to create a hypothetical Ground Force Maneuver Operation Scenario for this exploration. A tailored Waterfall systems engineering...
Topics: Design of Experiment, ground force maneuver operations, UAV, MANA, Nearly Orthogonal Latin...
The Department of Defense uses complex high-dimensional simulation models as an important tool in its decision-making process. To improve on the ability to efficiently explore larger subspaces of these models, this dissertation develops a set of experimental designs for searching over as many as 22 variables in as few as 129 runs. These new designs combine orthogonal Latin hypercubes and uniform designs to create designs having near orthogonality and excellent space-filling properties. Multiple...
Topics: Decision making, Experimental Design, Latin Hypercube, Uniform Design, Agent-Based Simulation,...
Naval Postgraduate School
by Lee, Kok Kiang
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We consider a sensor that is subject to false positive and false negative errors. The sensor searches for stationary threat objects such as ballistic missile launchers or improvised explosive devices. The objects are located in a certain area of interest, which is divided into areacells. The areacells are defined such that each of them may contain, at most, one threat object. The task of the sensor is to determine if an areacell contains a threat object, and the objective of the searcher is to...
Topics: Guided missiles, Mathematics, Payment
Naval Postgraduate School
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Plates of continuously cast AA5083 were subjected to friction stir processing (FSP) by three overlapping plunge and traverses. The FSP used a threaded pin tool with a pin diameter of 3 mm, pin length of 3 mm and a shoulder diameter of 10 mm. The process was run at constant tool rotation and traverse speeds of 800 rpm and 76.2 mm min-1, respectively. The microstructure of the processed region was examined by optical microscopy and orientation imaging microscopy. FSP of the AA5083 reduced the...
Topics: Superplasticity, Aluminum, Testing
Electron transport properties of terahertz (THz) longitudinal optical (LO)-phonon quantum cascade (QC) structures were modeled, in order to investigate high gain quantum cascade laser (QCL) structures. A new structure, a step well QC structure, was proposed. Under such an arrangement, there are three main energy levels within the step well, where the transition from the upper state to the middle state is at the THz radiative spacing and the transition from the middle state to the lower state is...
Topics: Physics., Terahertz, THz, Quantum cascade structure, QC structure, Quantum cascade laser, QCL, Step...
The objective of this research work was to evaluate and test the Read Prediction Buffer integrated circuit (IC). This IC attempts to decrease main- memory latency by predicting the next data cache read miss address and pre- fetching the data before the miss actually occurs in the cache. The motivation for its testing is that, if correct, the chip will significantly improve the speed of imbedded microprocessors which are so prevalent in modern equipment. The approach taken, was to place the RPB...
Naval Postgraduate School
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Terrain classification is studied here using the tool of texture analysis of high-spatial resolution panchromatic imagery. This study analyzes the impact and effectiveness of texture analysis on terrain classification within the Elkhorn Slough Estuary and surrounding farmlands within the central California coastal region. Ikonos panchromatic (1 meter) and multispectral (4 meter) imagery data are examined to determine the impact of adding texture analysis to the standard MSI classification...
Topics: Ikonos, Imagery interpretation, Multispectral, Remote sensing, Scene classification, Texture filters
Naval Postgraduate School
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This thesis explores the perceived need or lack of need for an active defense system afloat (e.g., the covert analysis detection [CAD] system) to protect shipboard networks from possible cyber-attacks. As hacking methods evolve, it is likely that nation-states and terrorists will attempt to interfere with or take control of shipboard systems remotely. This thesis builds on the work of previous NPS theses that suggest the Navy consider deploying a CAD system in the Aegis Combat System to secure...
Topics: Covert Analysis Direction System, covert analysis detection, CAD, shipboard networks, cyber attack
Naval Postgraduate School
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Insurgency and irregular war continue to be a prevalent phenomenon in the international system. Fighting irregular wars challenge military doctrine used by established militaries across the developed world. These militaries invariably end up combating insurgencies through train and equip missions, although the adoption of train and equip usually happens after the insurgency has become well established. This thesis examines and analyzes approaches taken by the organized militaries from...
Topics: Afghanistan, Turkey, Colombia, train, equip, insurgency, counterinsurgency, PKK, FARC, mobile...
Naval Postgraduate School
by Toenyes, Shawn E.
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During the Cold War, the United States constructed a nuclear triad, which consists of three components: strategic bombers, intercontinental ballistic missiles (ICBMs), and submarine-launched ballistic missiles (SLBMs). The triad's mission was to ensure that the U.S. nuclear force would not be crippled or destroyed should an enemy attempt a first strike attack against the United States. This in turn offered a credible threat of a U.S.-launched second strike, enhancing the overall effectiveness...
Topics: triad, deterrence, bombers
Naval Postgraduate School
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A problem for the Navy Supply System is identifying the proper inventory model for managing a Hazardous Material Minimization Center. This thesis analyzes three recently proposed inventory models: two continuous review economic order quantity (EOQ) inventory models and a periodic review inventory model. Based on this analysis, the authors develop both a continuous review EOQ model and a periodic review model for evaluation. These models differ from the previous ones in that they comprise all of...
Naval Postgraduate School
by Henderson, Christopher B.
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The purpose of this thesis is to introduce the concept of having a jointly integrated networking schema to better enhance battlefield communications and the dissemination of information using a smart push/pull concept from the highest commander down to the individual soldier. The concept of having a robust and dynamic network could provide the United States Armed Forces a better way of integrating the individual soldier's performance into higher level units. Current systems in the armed forces...
Naval Postgraduate School
by Lemon, Daniel W.
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There is much debate about how Southeast Asia views China's ascendance on the world stage. Beijing's expanding economic, diplomatic, and military influence has countries in the region concerned about how China will use its new power and influence. Vietnam is particularly concerned, since it shares a border with China and for many centuries was under China's control. Vietnam's experience with China may shed some light on how Southeast Asia is adapting to China's rise. Today, Vietnam finds itself...
Topics: International relations, Communism
Naval Postgraduate School
by Reynolds, James V.; Smith, Craig L.
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Over 100 million tablet computers have been sold in the last three years. They now have the computing power of a state-of-the-art laptop of just a few years ago. This computing power and market saturation allows them to become viable virtual environment (VE) trainers. Tablets have a different set of input modalities and user expectations, which need to be taken into careful consideration when a VE trainer is designed. The authors developed a VE call for fire (CFF) trainer and explored the...
Topics: Virtual environment, mobile, tablet, simulation, training, call-for-fire, window to the world
Naval Postgraduate School
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This thesis analyzes and documents the Army's training development process as it relates to the materiel development of corresponding Army acquisition programs. Training development is a vital necessity for the successful fielding of any new materiel item. The acquisition process in general should not only focus on materiel development management, but on training development management as well. The performance of any weapon system will always be a measure of both how well the equipment is made...
Naval Postgraduate School
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This thesis investigates methods for determining goals and expectations for fielded jet engines. Some of these methods employ concepts used in Reliability Centered Maintenance (RCM). The procedures developed here can be applied to any fielded jet engine. The data used by this thesis was extracted from the Naval Aviation Logistics Data Analysis (NALDA) database. The desktop software programs that were used to attain reliability parameters are readily available to any command. The data analysis...
The United States Army has struggled to implement the stability operations doctrine of its counterinsurgency strategy in Iraq. Despite the emphasis in national strategic guidance documents and written Army field manuals, stability operations continue to evade the Army as a major priority. This thesis seeks to answer: Why has the Army, as an organization, had such a difficult time implementing stability operations? Additionally, this thesis attempts to determine whether the Army made its best...
Topics: Terrorism, Rehabilitation, Civil rights
Naval Postgraduate School
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Marine mammal whistle calls present an attractive medium for covert underwater communications. High quality models of the whistle calls are needed in order to synthesize natural-sounding whistles with embedded information. Since the whistle calls are composed of frequency modulated harmonic tones, they are best modeled as a weighted superposition of harmonically related sinusoids. Previous research with bottlenose dolphin whistle calls has produced synthetic whistles that sound too clean for...
Topics: Aquatic animals, Hearing, Mammals, Dolphins
Technological advances in ship systems have enhanced the capabilities of United States Naval vessels in recent years, however, these changes come with unintended consequences. Only in recent years have we begun to study the effects of motion on the work/rest patterns of human operators in environments. The purpose of this study was to research the performance issues related to motion in combination with the reduction of staffing onboard naval vessels. This study supports previous findings that...
Topics: Motion effects on performance, Reduced manning, Performance in maritime environments, SAFTE model,...
This thesis examines the following hypothesis: Through the combined use of common training and collaborative planning, a decision maker may sufficiently alleviate the harmful effects of an environment of information so that he/she can continue to make effective decisions. An environment of extreme information ambiguity, a dependent variable, is one of the most difficult components of a battle where the decision maker may reach a confusing and debilitating point where surviving seems less and...
Topics: Leadership, Decision making, Systems engineering
DecisionNet is an online Internet-based repository of decision technologies. It links remote users with these technologies and provides a directory service to enable search and selection of suitable technologies. The ability to retrieve relevant objects through search mechanisms is basic to any repository's success and usability and depends on effective classification of the decision technologies. This thesis develops classification methods to enable indexing of the DecisionNet repository....
Naval Postgraduate School
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The Real-Time Engagement Area Development Program (READ-Pro) is a PC-based prototype system which provides company-level commanders with real-time operational analysis tools to develop engagement areas (EA) for direct fire (DF) systems. READ-Pro automates and streamlines the current manual system. READ-Pro significantly enhances the evaluation of a defense by presenting the commander with a visual display of the coverage and a quantitative measure of its fragility. READ-Pro also supports the...
Topics: Real-time data processing., Engagement area development, real-time analysis, XML, Loosely Coupled...
The Homeland Security Enterprise (HSE) lacks a process to create a body of knowledge to unify its stakeholders. This thesis asked if a set of rules and an assessment methodology could be applied to three wikis to illustrate how the rules can improve the quality of information-sharing across the HSE. The research for this thesis applied a set of rules and an assessment methodology to case studies testing the hypothesis that wikis are a good example of an enterprise social network (ESN) and could...
Topics: information sharing, crowdsourcing, collective intelligence, wiki, enterprise social network, and...
Control of the U.S. border is a primary concern for the Department of Homeland Security. Three of the department's components have major roles in providing border security and control. With increasing costs and constantly changing threats, it is vital that all border organizations work together collaboratively. This thesis looks at two new ideas, border regionalization and joint regional border commands, and compares them with current efforts to increase collaboration. By establishing border...
Topics: Joint regional border commands, collaboration, border control, border security, regionalization,...
Naval Postgraduate School
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This thesis uses agent-based modeling techniques to develop a simulation of the operational-level naval planning process. The simulation serves as an initial exploratory laboratory for analyzing the consequences of the force allocation, force deployment, and force movement decisions made by operational-level naval commanders during times of conflict or crisis. This model will hopefully help decision-makers in gaining insight into the naval planning process and enable them to make more informed...
In a political system with overall weak contestation, is participation capable of improving accountability? If so, how? Accountability is a combination of answerability and enforcement, and may be viewed as vertical from the citizenry, or horizontal from adjacent government institutions. Through the socializing and deliberative participatory processes of informing, consulting with, involving, collaborating with, and empowering, horizontal accountability, and potentially vertical accountability,...
Topics: Rwanda, accountability, democracy, vertical accountability, horizontal accountability, imihigo,...
Since Mao Zedong founded the People's Republic of China (PRC) in 1949, it has fought in one major war and several skirmishes, and has frequently used military force in the form of coercive diplomacy. The pattern of China's use of force, however, has steadily declined over time. At the same time, China's domestic politics have reformed from allowing one person high amounts of consolidated policy-making power to more institutionalized consensus-based governance. Do the changes in domestic...
Topics: China, Chinese foreign policy, Chinese domestic politics Mao Zedong, Jiang Zemin, Deng Xiaoping, Xi...
This thesis suggests measures of performance MSC could use to monitor ongoing improvements in the Special Mission Oceanographic Ship program. A literature review was conducted to establish the importance of measures and propose a process for their development. Interviews with NAVOCEANO and COMNAVMETOCCOM personnel determined customer needs and their expectations concerning service quality. Using this input, a list of performance measures was synthesized. Interviews of MSCLANT and MSCPAC...
Naval Postgraduate School
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A numerical study on laminar incompressible flows in 2-D straight walled diffusers in the low Reynolds number regime (105-1048) is presented to investigate performance and various flow regimes that might exist. Tail channels are situated downstream the diffusers. Geometries with area ratios AR=1.15 to 5 and non-dimensional lengths of L/W1=1 to 48 are considered. Results are presented in terms of flow regime maps for Reynolds numbers of 105, 210, 314, 420, 629, 1,048 and pressure recovery...
Topics: Diffusers, Reynolds number
The performance of IEEE 802.11g wireless local area network (WLAN) standard receivers when the signal is transmitted over a frequency-selective, slowly fading Nakagami channel in a pulse-noise interference environment when errors-and-erasures Viterbi decoding is used is examined. The different combinations of modulation (both binary and non-binary) and convolutional code rate specified by the WLAN standard are examined. The performance obtained with errors-and-erasures decoding (EED) is...
Topics: Physics, Decision making, Electrical engineering
Naval Postgraduate School
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The integration of photonic and electronic components to realize a photonic sigma delta ADC is considered in this thesis. The integration process was broken up into steps. First, the performance of a pair of dual-port Mach-Zehnder interferometers (MZI) modulating a train of narrow high-speed laser pulses from a mode-locked laser was investigated. Various parameters like the half-wave voltage (V) and insertion loss were verified. Next, the ability of the MZIs to modulate the laser pulses,...
An error probability analysis of a communications link employing convolutional coding with soft decision viterbi decoding implemented on a fast frequency hopped, binary frequency shift keying (FFH(BFSK) spread spectrum system is performed. The signal is transmitted through a Rician fading channel with partial band noise interference. The receiver structures examined are the conventional receiver with no diversity, the conventional receiver with diversity and the assumption of perfect side...
Topics: Radio noise., Radio|xInterference.
Naval Postgraduate School
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The Modular Pebble Bed Reactor is a small high temperature helium cooled reactor that is being considered for both electric power and hydrogen production. Pebble bed reactors are being developed in South Africa, China and the US. To make smaller 120 Mwe reactors economically competitive with larger 1500 Mwe traditional light water reactors changes in the way these plants are built are needed. Economies of production need to be sufficiently large to compete with economies of scale. MIT (Berte)...
The homeland security community has struggled with a unifying system to support national preparedness even though states and local jurisdictions have gone to great lengths to enhance their capability. State preparedness reports, with inconsistent ranking systems and measurement tools that are self-assessments of individual capabilities, lack a holistic connection. The literature suggests that a one-size-fits-all assessment system has limited comparative value and has not proven to answer to the...
Topics: Preparedness, outcomes, leadership, management, strategy, logic model
Naval Postgraduate School
by Flynn, Kimberly C.; Boorom, Eric W.; Grasso, Colleen E.
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The objective of this project is to conduct an analysis of the CECOM Contracting Center's Paperless Contracting Folder program in regards to maintaining its DoD 5015.2 certification. The desired outcomes will be the creation of a File Plan and User Guide to assist with DoD 5015.2 certification.
Topics: Electronic data interchange., Paperless Contract Folder's (PCF) DoD 5015.2 certification.
The level of unmanned aerial system (UAS) technology provides an opportunity to improve productivity and at the same time increase safety in airport operations. This thesis aims to study the requirements of a system of Group 1 UAS swarm to perform foreign object debris (FOD) management at an airport. A concept of operations of the Automated FOD Detection System (AFDS) was designed, and the graphical user interface (GUI) was developed to prove the concept. A variety of image processing...
Topics: runway safety, foreign object debris, unmanned aerial system, image processing
Naval Postgraduate School
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This thesis develops a simple method for evaluating adversarial risk within the transportation portion of the nuclear fuel cycle for commercial electric power generation, and develops models that can guide the reduction of that risk by such means as rerouting and decoy shipments. A conceivable, worst-case attack by an intelligent adversary will cause a localized release of radioactive material. A damage function is defined using the population in the vicinity of the attack. Using hypothetical,...
Topics: Nuclear material, Hazmat, Transportation network, Adversarial risk, Mixed integer programming, Decoy
Naval Postgraduate School
by Jones, Mary J.
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The attention that SARS created in 2003 has influenced public and political perceptions about the risks associated with infectious diseases and the role the public health system should play in national security. This comparative case study was conducted to examine the Canadian public health's system response to SARS in order to formulate recommendations for the U.S. public health system. This analysis demonstrated that the governmental organizational structure of the U.S. public health system...
Topics: Public health, National security, Communicable diseases, United States, Prevention, Public health...
Naval Postgraduate School
by Cowan-Sharp, Jessy.
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This thesis applies Latent Dirichlet Allocation (LDA) to the problem of topic and topic change in conversational threads using e-mail. We demonstrate that LDA can be used to successfully classify raw e-mail messages with threads to which they belong, and compare the results with those for processed threads, where quoted and reply text have been removed. Raw thread classification performs better, but processed threads show promise. We then present two new, unsupervised techniques for identifying...
Topics: Conversation analysis, Electronic mail messages
Naval Postgraduate School
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The Department of Defense (DoD) uses simulation for many purposes. Early computer based distributed simulation support environments allowed individual models to communicate with each other but fell short of providing a general distributed simulation solution until the advent of High Level Architecture (HLA). HLA allows users to combine sub-models into one simulation, but it employs a subscription based communications scheme that did not exist in previous support environments. Analysts often use...
Trust and the establishment of legitimacy are essential to building strong relationships between law enforcement and the communities they serve. Distrust of the police can lead to a lack of community involvement and, in some cases, a perception of the police as an occupying force. American policing has faced recent challenges regarding trust, legitimacy, and accountability resulting in calls for police reform. This thesis answers the question of whether the police reforms outlined in the Report...
Topics: trust and legitimacy, police reform, Police Service of Northern Ireland, Patten Report, Patten...
Naval Postgraduate School
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It is important to understand the impact that the proliferation of information displays has on the warfighters ability to reason about, or make sense of, battlefield information. This research investigates how information sources at a tactical operations center (TOC) workstation affected a battle captains ability to understand and portray ground truth in a simulated battlefield scenario. Twelve active-duty officers with previous battle-captain experience were randomly assigned to one of four...
Topics: Sensemaking, Situational Understanding, Dynamic Model of Situated Cognition, Workload, Network...
This thesis describes a functional framework for developing strategic assessment at the Combatant Command level, specifically European Command. The framework establishes a functional architecture based on derived requirements and objectives according to the systems engineering process described by Dennis Buede. This thesis describes the current methodology for developing theater plans based on the national strategies established by the President, Secretary of Defense and Chairman of the Joint...
Topics: Strategic Assessment, Functional Architecture, Assessment Framework, Combatant Commands, Theater...
The development of a high average power FEL for military applications, whether shipboard or not, represents a significant advancement in technology over present weapons systems design. The FEL has significant advantages over conventional kinetic systems and other classical high-energy laser systems. The rapid response, wavelength tunability, and infinite magazine make the FEL a highly desirable shipboard weapon system. The initial pan of this thesis examines the advantages of a FEL over a...
Naval Postgraduate School
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The development of distributed systems needs to consider multiple factors such as performance, scalability, resource sharing, and fault tolerance. This thesis proposes a simple agent-based framework to address these concerns when building distributed applications. Agents act as interfaces among processes to interact and to cooperate in a distributed environment. These agents encapsulate the implementation details and make the network transparent to running processes. The proposed framework is...
The major problem addressed by this research is the development of one or more scheduling heuristics suitable for applications which involve repetitive execution of task graphs on a distributed memory multiprocessor, and to test the performance of these heuristics on a multiprocessor. The approach taken was to create more than one modified version of the PS heuristic previously introduced. The modifications aim to provide a more realistic characterization of the computation-communication...
Naval Postgraduate School
by Szczepankiewicz, Peter J.; Velazquez, Luis E.
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Authentication is particularly important in the SAAM system because SAAM uses mobile codes, called resident agents. These resident agents are loaded onto SAAM routers dynamically, and execute on the destination SAAM router. Mobile code in the SAAM system requires an authentication scheme to prevent an outsider from sending a malicious resident agent. The primary focus of this research is to find the best-fit authentication scheme for the SAAM system. SAAM with authentication can be used as the...
Topic: Subject term: Authentication, Encryption, Routing, Java, Key Distribution, Kerberos, Secure Time...
Naval Postgraduate School
by Deering, Viviane; Grates, Patrick; Hedge, Tom; Kung, Sein; Martinez, Maria; Mcarthy, Percival; Pugh, Kevin; Radojkovic, Sasha
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This project concentrates on implementing network centric military operations with specific threat engagement scenarios using legacy and future warfare systems based on open architecture concepts. These systems may be based at sea, on land or in the air, and provide fire control solutions that match sensed threats to available weapons throughout the battle space. Using a unique methodology, the project provides the following: 1) characterization of the battle space 2) description of the design...
Naval Postgraduate School
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Personal and professional development is paramount to the growth and success of individuals and the organizations they comprise. The United States military's special operations forces (SOF) are elite small teams that work in austere situations globally. SOF operators are expected to be competent and capable at all times. They must rely on their team members for personal and professional development. This paper sought to assess the characteristics and outcomes of developmental relationships...
Topics: Navy SEALs, Army Special Forces (Green Berets), Marine Raiders, Special Operations Forces, SOF,...
Training needs assessment (TNA) is utilized effectively as an evaluation tool by organizations in various countries to determine if training is the best solution to their problems. These organizations have benefited greatly by identifying the weak links and finding suitable solutions, thus optimizing their efficiency. The effectiveness and advantage of a TNA evaluation process, however, has been neither properly understood nor implemented in Arab culture. It is felt that organizations in...
Topics: training needs assessments, human resources, TNA, Likert scale analysis, LSA
Naval Postgraduate School
by Lavery, Jeffrey B.
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The focus of this research is to accurately model the tunnel junction interconnect within a multi-junction photovoltaic cell. A physically based 2-D model was created in Silvaco Inc.'s ATLAS© software to model the quantum tunneling effect that is realized within a multi-junction cell. The tunnel junction interconnect is a critical factor in the design of multi-junction photovoltaics and the successful modeling of the junction will lead to the ability to design more efficient solar cells. The...
Topics: Quantum electronics, Tunneling (Physics), Photovoltaic cells, Design and construction,...
The use of gallium arsenide (GaAs) logic circuits in high performance computers and digital systems in space applications is desirable due to their high speed and immunity to total dose radiation. Several problem areas must be overcome for more widespread use. First, GaAs MESFETs with short gate lengths are susceptible to single event upsets (SEU) in a high radiation environment and second, GaAs circuits consume relatively large amounts of static power. To overcome the shortcomings of these...
Naval Postgraduate School
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The conventional wisdom concerning the future of Iraq after the Gulf War of 1990-1991 centers on the prospect of Saddam Hussein and the Bath Party being ousted from power. Should this happen, critics argue, peace, security, and predictability will return to Iraq in particular and the Middle East in general. This view of the situation is wrong. This thesis examines the political history of Iraq since the end of World War One, the formation of the Bath Party, and the Bath Party since its ascent...
Topics: Ba'th, Ba'th party, Saddam Hussein, Middle Eastern politic
Naval Postgraduate School
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The literature on civil-military relations has always focused on democratic civilian control of the armed forces. There is currently a debate in the civil-military relations field concerning the amount of military knowledge politicians should possess in order to effectively control the armed forces. While one side argues this knowledge can be minimal, the other argues politicians need to have a general working knowledge of military affairs. This thesis attempts to illustrate the differences...
Topics: Trinity, Civil-military relations, Democracy
Naval Postgraduate School
by Nedresky, Donald L.
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An adaptive control system is a system that detects changes in the plant parameters and makes necessary adjustments to the systems performance. This thesis examines the use of parallel distributed processing systems (neural networks) in adaptive control. A general neural network structure is introduced and a description of the Backpropagation paradigm is given. A discussion of adaptive control theory including the one step ahead prediction control algorithm and the linear least squares...
Topics: Engineering, Aeronautics, Flight control., Neural Networks, Adaptive Control, Backpropagation,...
Naval Postgraduate School
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Every year the Department of Defense's (DoD) expenditures on software alone amount to almost ten billion dollars, with maintenance costs comprising the majority of this figure. Recent studies have indicated that an effective solution to help curtail the large maintenance cost is by capturing the rationale which was used to create the systems requirements and designs, and using this information throughout the life cycle. However, various models proposed by current research for capture of design...
Topics: Design rationale capture, Design reuse
The recent increase in high-profile insider cyber exploits indicates that current insider threat analysis (ITA) is insufficient to handle the growing insider threat problem. Well-established academic literature agrees that information overload is a problem ITA must overcome because ITA remains a human-intensive task. Two conceptual strategies to overcome information overload include reducing information and distributing information among additional people to accommodate the load. This...
Topics: insider threat to cybersecurity, cybersecurity philosophy, attribution theory, process loss theory
This thesis analyzes the growth capability of the Space Shuttle Orbiter's Multifunction Electronic Display Subsystem (MEDS). MEDS is a new \"glass cockpit\" system, using Active Matrix Liquid Crystal Displays (AMLCD) to replace the existing Orbiter cockpit instruments. The primary goals were to analyze the MEDS growth capabilities and to propose advanced Orbiter displays using the MEDS. Analysis of the Orbiter state vectors resulted in designs for real-time graphical displays for use...
Naval Postgraduate School
by Yoder, Elliott Cory
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This thesis investigates the nature and functions of commercial style market research. It examines the issues and barriers which face Navy contracting personnel should commercial style market research be assimilated and employed at contracting activities. It specifically considers an acquisition environment characterized by a downsized infrastructure and rapidly changing technological environment. Commercial entities have been successfully using market research to make better qualified business...
Topics: Market research, Market surveillance, Purchasing research, Commercial practices, Commercial style...
Naval Postgraduate School
by Riley, Francis Clair
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The paper considers the problem of optimally allocating advertising funds from a game theory point of view. Two basic models are presented and then expanded upon. These models are simply structured having originated from work done on the Colonel Blotto Game in the early 1950's. A prime objective of the paper is to briefly review representative examples of work previously done in this area and indicate the possible direction of future research. One of the more interesting extensions of the basic...
Topic: ADVERTISING
This thesis compares two alternative measures of recruit market potential: Production-Weighted Qualified Military Available (PQMA) and High- Quality Qualified Military Available and Interested (HQ QMJ). The services rely on estimates of market potential to allocate recruiting resources efficiently and establish enlistment goals. Using 1990 accession data, regression and correlation analysis were used to determine the relationship between accessions and estimated market potential for both all...
Topics: Recruiting, Recruit market, Qualified military available, QMA, PQMA, HQ QMJ
Naval Postgraduate School
by Bergesen, Sean A.
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This thesis explores the concept of Adaptive Joint Force Packaging (AJFP). Provided first is an overview of the concept itself, including the factors behind its development, the manner and scope of its implementation, and the benefits proponents claim it will bring. Also reviewed are the various concerns and criticisms that AJFP has created within the defense establishment. Among those are reservations about the concept's impact on unit integrity and doctrine, the role of the Chairman of the...
Topics: Adaptive Joint Force Packaging, AJFP, USACOM, Forward presence, Non-traditional missions, Joint...
The delivery of supply in combat operations is very important and often results in success or failure of a mission. This activity, as well as other transportation problems, has traditionally been modeled using global optimization techniques, such as linear programming. However, the goal of this thesis is to examine the feasibility of an agent-based solution to study the movement of material through a road network. The requirement is to build an agent-based system that finds the optimal route...
Topics: Transportation, Military, United States, Logistics, Adaptive computing systems, Complex adaptive...
Naval Postgraduate School
by Hwang, J.S.
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A study of the shielded coplanar line (SCPL) is presented. The main goal of this theses is to develop an equivalent circuit model for a typical discontinuity in the SCPL. The formulation is based on Galerkin's method, using Green's function applied in the Fourier transform domain. The impedance (Z sub 0) has been calculated by using a variational method. The propagation constant (betaomega) and effective dielectric constant of the SCPL have been calculated by using a method of moments. The...
Topics: Boundary value problems., A discontinuity study in shielded coplanar line
Naval Postgraduate School
by Lewis, Samuel W.
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This thesis is the study of the cost associated with expanding the Navy's drug abuse education program as a means of controlling the Navy's drug abuse problem. It focuses on the former Navy Drug and Alcohol Safety Action Program (NADSAP) now the Personal Responsibility and Values Education and Training (PREVENT) course. The thesis asks the questions: What are the characteristics of the Navy's drug population? What are the costs/benefits of the Navy's Level III rehabilitation program? What are...
Topics: Drugs, PREVENT, Navy, Military
Naval Postgraduate School
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This thesis analyses the Naval Reserve Force Oliver Hazard Perry class (FFG-7) guided missile frigates. It assesses the cost-effectiveness of operating these ships in the Naval Reserve fleet vice the Active fleet. The study begins with a brief history of the Naval Reserve Force (NRF) and outlines its current role and mission. A cost identification and comparison of operating the FFGs in each fleet follows. To capture all of the relevant costs, this comparison is based on a model developed by...
Topic: NA
Naval Postgraduate School
by Nixon, Roy L.
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Blacks have joined the enlisted ranks of the American military in record numbers since the end of the draft. However, the armed forces are now engaged in the process of downsizing, and there is some speculation that blacks may be disproportionately affected by the reduction-in-force. This study analyzes defense drawdown policies, force demographics, historical trends, and environmental factors in an attempt to determine the overall impact of the proposed cuts in military manpower on persons in...
Topics: Military manpower, Minority accessions
Naval Postgraduate School
by Woodruff, Shamika N.B.
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The United States economy is in a phase of fiscal stress; however, if the rate of spending continues as it has during the last three presidential terms; the United States will soon experience a state of fiscal crisis. The United States must take measures to affect the rate of spending. Since the 1940s, DoD has made trade-offs on the goals and priorities of stakeholders within the systemalso known as acquisition reform. This research makes an assessment on how DoD has implemented the last...
Topics: Acquisition Reform, BBPi, Better Buying Power, DAU, acquisition outcomes, SBIRS, knowledge flow...
Three distinct inlet-side-dump ramjet-combustor geometric configurations were investigated. Non-intrusive watertunnel flow-visualization techniques were utilized to qualitatively determine optimum flame-stabilization dome lengths and fuel-injection locations. The results were in good agreement with the results from previous studies. The optimum dome lengths which provided good fuel distribution and steady mixing all had lengths between 0.31 D and 1.4 D. Fuel injection in a narrow region on the...
Topics: Side dump combustor, Ramjet, Flow-visualization
Naval Postgraduate School
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This thesis is an analysis of flight hour cost variance in the Naval Air Reserve and Fourth Marine Aircraft Wing. The broad objective of the thesis was to identify and analyze factors hypothesized to cause variance in cost per flight hour. An overview of the Naval Air Reserve Force Structure and budgetary organizations is presented. The relatively recent shift in the use and role of reserve forces towards Total Force concept goals is highlighted. An interview process is described in which four...
Topics: Management, Budget., Naval Air Reserve, Flight Hour Program, Cost per Hour, Aviation Depot Level...
This thesis explores the effectiveness of the U.S. Navy's basic skills enhancement program entitled Functional Applied Skills Training (FAST) in providing the basic reading skills necessary for enlisted personnel to more ably perform their jobs in the U.S. Navy fleet during the first three years of their enlistment. Current FAST program mission, FAST's impact on fleet job performance, and future U.S. Navy enlisted manpower requirements are examined to identify mission areas where program...
Topics: Performance, Training, Employees., Basic Reading Skills, Fleet Performance Measures
Naval Postgraduate School
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This thesis evaluates the ability of the Xpress-MP software package to solve complex, iterative mathematicalprogramming problems. The impetus is the need to improve solution times for the VEGA software package, which identifies vulnerabilities to terrorist attacks in electric power grids. VEGA employs an iterative, optimizing heuristic, which may need to solve hundreds of related linear programs. This heuristic has been implemented in GAMS (General Algebraic Modeling System), whose...
Topics: Computer networks, Electric power, Software engineering, National security, Terrorism, Linear...
A major component of the US Army's Future Combat Systems (FCS) will be a fleet of eight different manned ground vehicles (MGV). There are promises that 'advanced automation' will take on many of the tasks formerly performed by soldiers in legacy vehicle systems. However, the current approach to automation design does not relieve the soldier-operator of tasks; rather, it changes the role of the soldiers and the work they must do, often in ways unintended and unanticipated. This thesis proposes a...